<template lang="html">
  <div class="list" ref="wrapper">
    <div class="">
      <div class="area" ref="▲">
        <div class="title border-topbottom">
          当前城市
        </div>
        <div class="button-list">
          <div class="button-area">
            <div class="button">
              {{this.currentCity}}
            </div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">
          热门城市
        </div>
        <div class="button-list">
          <div class="button-area"
          v-for = "item of hot"
          :key="item.id"
          @click = "handleCityClick(item.name)"
          >
            <div class="button button-hot">
              {{item.name}}
            </div>
          </div>
        </div>
      </div>
      <div class="area"
      v-for="(item,key) of cities"
      :key="key"
      :ref="key"
      >
        <div class="title border-topbottom">
          {{key}}
        </div>
        <div class="item-list">
          <div class="item border-bottom"
          v-for="innerItem of item"
          :key="innerItem.id"
          @click = "handleCityClick(innerItem.name)"
          >
          {{innerItem.name}}</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { mapState, mapMutations } from 'vuex'
import Bscroll from 'better-scroll'
export default {
  name: 'cityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0] || this.$refs[this.letter]
        console.log(element)
        console.log(this.letter)
        this.scroll.scrollToElement(element)
      }
    }
  },
  methods: {
    handleCityClick (city) {
      // this.$store.commit('changeCity', city)
      this.changeCity(city)
      this.$router.goBack(-1)
    },
    ...mapMutations(['changeCity'])
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    $:before
      border-color: #ccc
    $:after
      border-color: #ccc
  .border-bottom
    $:before
      border-color: #ccc
  .list
    margin-top: 1.58rem
    position: absolute
    top: 0
    left: 0
    right: 0
    bottom: 0
    overflow: hidden
    .title
      line-height: .44rem
      background: #eee
      padding-left: .2rem;
      color:#666
      font-size: .26rem
    .button-list
      padding: .1rem .2rem
      padding-right: 1.1rem
      overflow: hidden;
      .button-area
        float: left
        width: 33.33%
        .button
          margin: .1rem;
          background: $bgColor
          text-align: center;
          padding: .1rem 0;
          color: #fff
          border-radius: .05rem
        .button-hot
          background: #fff
          color: $bgColor
          border: .01rem solid $bgColor
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>
